Quick C# Twitter API

Quick little class I knocked together to do 2 basic functions in twitter but can easily do more. Add this to a cmdlet in powershell or command line app to integrate with anything else!!

///
/// Twitter.cs 
/// A simple C# class with 2 basic methods, add away with other methods- 
/// http://apiwiki.twitter.com/REST+API+Documentation#statuses/update
///

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Collections.Specialized;
using System.Web;

namespace Net.Ant.Twitter
{
    public class Twitter
    {
        protected string _username;
        protected string _password;

        /// <summary>
        /// Creates a new instance of the Twitter API class
        /// </summary>
        /// <param name="username">Your Twitter username</param>
        /// <param name="password">Your Twitter password</param>
        public Twitter(string username, string password)
        {
            _username = username;
            _password = password;
        }

        #region Twitter API functions

        /// <summary>
        /// Sends a private message
        /// </summary>
        /// <param name="user">User to message</param>
        /// <param name="text">Message text</param>
        public void SendMessage(string user, string text)
        {
            NameValueCollection col = new NameValueCollection();
            col.Add("user",user);
            col.Add("text",text);
            HttpPOSTRequest("http://twitter.com/direct_messages/new.xml", col);
        }

        /// <summary>
        /// Tweet/Update!
        /// </summary>
        /// <param name="message">Message text</param>
        public void Tweet(string message)
        {
            NameValueCollection col = new NameValueCollection();
            col.Add("message", message);
            HttpPOSTRequest("http://twitter.com/statuses/update.xml", col);
        }

        #endregion

        #region Internal functions for HTTP requests

        /// <summary>
        /// Make a call to the twitter website, will used the username/pass in the class
        /// </summary>
        /// <param name="url">The URL to request</param>
        protected string HttpPOSTRequest(string url,NameValueCollection post_parameters )
        {
            HttpWebRequest req = (HttpWebRequest) WebRequest.Create(url);
            req.Credentials = new NetworkCredential(_username, _password);
            req.PreAuthenticate = true;

            string postData = PostEncodeArray(post_parameters);

            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            req.ContentLength = postData.Length;
            using(Stream writeStream = req.GetRequestStream())
            {       
                UTF8Encoding encoding = new UTF8Encoding();
                byte[] bytes = encoding.GetBytes(postData);
                writeStream.Write(bytes, 0, bytes.Length);
            }

            // make request
            string result=string.Empty;
            using (HttpWebResponse response = (HttpWebResponse) req.GetResponse())
            {
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (StreamReader readStream = new StreamReader (responseStream, Encoding.UTF8))
                    {
                        result = readStream.ReadToEnd();
                    }
                }
            }
            return result;
        }

        /// <summary>
        /// Posts the supplied data to specified url.
        /// </summary>
        /// <returns>a string containing the result of the post.</returns>
        protected string PostEncodeArray(NameValueCollection m_values)
        {
            StringBuilder parameters=new StringBuilder();

            for (int i=0;i < m_values.Count;i++)
            {
                if (parameters.Length != 0) parameters.Append("&");
                parameters.Append(m_values.AllKeys[i] + "=" + HttpUtility.HtmlEncode(m_values.Get(i)));
            }
            return parameters.ToString();
        }
        #endregion
    }   
}